The issue of GW's driving onto private land like that seems fairly common. I have never heard of it happening in the part of Illinois where I live. I think that in most instances GW's with any sense are not going to park their vehicle and walk in unless absolutely necessary, largely because they know that they are leaving their vehicle all alone while they are off doing stuff that is likely to irritate the locals. To my knowledge, the GW's in my area do only roads patrols and do safety/license checks on people entering and leaving the woods. Never heard of a GW actually walking on to property unless responding to a complaint.